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US Patent: 55,739
Wrench
Improvement in Screw-Wrenches
Patentee:
George C. Taft (exact or similar names) - Worcester, MA

USPTO Classifications:
81/174

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
Thomas H. Dodge - Worcester, MA

Manufacturer:
Not known to have been produced

Witnesses:
Thomas H. Dodge
H. L. Fuller

Patent Dates:
Granted: Jun. 19, 1866

Patent Pictures:
George C. Taft patent June 19, 1866
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Description:
The patent is for the internal configuration of an adjusting cylinder nut, and its connection to the moveable jaw.

The initial visual comparison is to Taft's Oct 16, 1860 patent no. 30,431; that patent had a "double screw" adjusting nut whereas this patent has a single screw engaging threads on the shank.

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